so my older bro is no longer using his 20 gallon tank so i'm going to bump up my 10 gallon fish. currently i have a male betta, 4 zebra danios, and 2 bronze corys. i'm looking to add a few more fish to the 20 gallon. i would definitely like to get a few more cories, and if i have the room, more danios to add to the pack, or perhaps a small school of some sort of tetra?

what i need to know is roughly how many more fish i can get of each species, and if you have another recommended fish to put in to add a bit of variety (if possible). thanks! :)[/b]

You have room for another small school of fish. I would suggest 4 or 5 Golden Barbs or 6 to 7 Cherry Barbs. Both of these fish will swim near the bottom of the water column, complimenting your existing display well.